Capillary passage ink remover for vent

ABSTRACT

A SYTLOGRAPHIC WRITING PEN HAVING INTEGRAL RESERVOIR WITH EXTENDIBLE AND RETRACTIBLE VENT AND CAPILLARY PASSAGE ADAPTED TO THE REMOVAL OF DEPOSITED INK FROM THE VENT OPENING AND VENT VALVE, PER SE.

Feb. 9, 1971 E. BOK 3,561,879

CAPILLARY PASSAGE INK REMOVER FOR VENT 2 Sheets-Sheet 1 Filed Feb; '15,1969 Feb. 9, 1971 50K 3,561,879

CAPILLARY PASSAGE INK REMOVER FOR VENT Filed Feb. 13, 1969 2Sheets-Sheet 2 Ma /r4? [db 480 50/6 United States Patent 3,561,879CAPILLARY PASSAGE INK REMOVER FOR VENT Edward Bok, 1011 Arlington Blvd.,Apt. 816W, Arlington, Va. 22209 Filed Feb. 13, 1969, Ser. No. 798,963Int. Cl. B43k 1/10 U.S. Cl. 401-258 9 Claims ABSTRACT OF THE DISCLOSUREA stylographic writing pen having integral reservoir with extendible andretractible vent and capillary passage adapted to the removal ofdeposited ink from the vent opening and vent valve, per se.

FIELD OF THE INVENTION This invention is such as to encompass all pensbe they for drafting or scribing and is particularly adapted to pens inwhich the reservoir of ink comprises an integral portion of the barrel,defining the pen.

SUMMARY OF THE INVENTION BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is aview in side elevation of a stylographic writing pen according to theinvention, a portion being broken away;

FIG. 2 is an enlarged fragmentary vertical sectional view-of the penaccording to FIG. 1, showing ink passages in the top of ink reservoirand along the vent stern;

FIG. 3 is a transverse sectional view of the writing pen taken alongsection lines 33 ofFlG. 2;

FIG. 4 is an enlarged fragmentary vertical sectional view of anotherembodiment of the pen according to the invention, showing the inkpassages in a separate ink reservoir cover and vent stem;

FIG. 5 is a transverse sectional view of the writing pen taken alongsection lines 5-5 of FIG. 4;

FIG. 6 is an enlarged fragmentary vertical sectional view of anotherembodiment of the stylogra'phic writing pen according to the invention,showing ink passages in ink reservoir cover and modified vent stem; and

FIG. 7 is a transverse sectional view of the writing pen taken alongsection lines 77 of FIG. 6.

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to FIG. 1, pen 10consists of barrel 12, which also serves as the ink reservoir, writingnib 14 and the pen tip 16. The rotatable filler ring 18 serves as acover for an ink filler opening (not shown) in the side wall 20 of thebarrel 12. Barrel cover 22 is by thread 24 attached to the barrel 12.Spring loaded vent stem 26, longitudinally extends through the opening28 in top 30 of the barrel 12. Its knob 34 protrudes through opening 32in the cover 22.

As shown in FIGS. 1, 2, and 3, inside 36 of the barrel top 30 isprovided with a number of ink passages 38, which passages extend fromthe vent opening 28 to the side wall 20 of the barrel 12. That part 40of vent stem 26, acting as vent valve, is provided with longitudinal inkpassages 42.

Using a vent system without excess ink removal means, such ink iscollected in the top cavity 44 of the ink reservoir 12, if the pen isnot in its normal inclined writing position. Otherwise, the greater partof it is carried downward as the pen is held in the writing position.Even while writing, droplets of ink, however, will stick to the top ofthe ink reservoir and vent valve and remain there. If then venting isrequired, a part of the droplets are taken upward with the stem 26 anddeposited in the ink collecting chamber 48. On occasion, where there ispositive pressure in the ink reservoir, venting of this reservoirthrough the ink filled valve recess 46 results in an extra flow of inkthrough the recess 46 into chamber 48, which ink may be added to a layerof already dried ink. The result is that after a short usage of the pen,the ink collecting chamber 48 is quite filled with dried ink near thevent opening 28 so that the reservoir venting then becomes difficult andchamber 48 has to be removed and cleaned.

Ink passages 38 in the present vent system carry off ink which asdroplets remained in the top part 44 of the ink reservoir after the penis being brought to its inclined writing position and the remaining thinink film on the surfaces near the vent opening 28 as a residue will nolonger affect the proper working of this vent system.

During the venting of the ink reservoir 12 through the vent opening 28air can enter or leave the collecting chamber 48 via the air passage 49in cover 22.

In FIG. 4, the ink reservoir cover 50 is leak-free attached to the top30 of barrel 12' by means of the barrel cover 22' which is screwed onthe barrel top 30'. The cover 50 is made of plastic or other syntheticmaterial with good characteristics for the forming of the fine inkpassages 38' (see FIG. 5). Easy cleaning of the vent system is possibleby removing covers 22' and 50 from the barrel 12'.

Here also is the air passage 49 in cover 22'. The recess 51 in the topof the cover 50 diminishes the longitudinal distance of the vent openingpassage 28', which distance can be limited due to the good guidance ofthe vent stem 26 in the cover opening 32. The enlarged top 27 of thevent stem 26' enables the lifting of the vent stem 26 by hand, wherebythe length of protruded vent stem is small as the recess 23 in the topof cover 22' acts as a collecting room for the top 27 in the lowestposition for the vent stem 26'.

In FIG. 6 another type of vent system is shown. The barrel 12" is ventedduring downward movement of vent stem 26'. To prevent excessive negativepressure in the barrel 12" after the venting, due to prolonged upwardmovement of the stem 26" after the sealing off of the vent opening 28",the diameter of this stem 26" must be kept small.

The barrel 12" has a big ink reservoir, has an air volume of5,000-10,000 mm. The diameter of the vent opening 28" is 1.5 mm. and theupward displacement of the vent stem 26" 2-3 mm. which dimensions resultin a displaced volume of the vent stem 26' of only 5-8 mmfi. This volumecreates such a small negative air pressure in the barrel 12", that afterthe venting action a long period of writing is made possible, before atoo high negative air pressure in the barrel 12" which is due to thecarrying off of about 50 mm. ink from this barrel 12" via the pen tip tothe writing surface, disturbs the normal flow of ink via the pen tip.

The whole vent system is thereby located in the barrel cover 22", whichby means of the screw thread 24" is leak-free secured to the barrel 12",vent block 52 is leakfree attached to the cover 22" with the aid of themilled outer surface 54 of its extension 56 and screw thread 58.

(See also FIG. 7.) Vent block 52 defines ink passages 38", extendingfrom the vent opening 28" to the bot-tom end 60 of this block 52. Ventstem 26", protruding through the vent opening 28" has its bottom 62provided with ink passage groove 42" and its vent valve 40" is providedwith the recess 46", whereby its top 64 is attached to the manuallyoperable knob 66 which protrudes through the opening 32". A compressionspring 68 is set around knob 66 and in between lower knob 3 end 70 andtop 72.

Venting the barrel 12 takes place by an upward movement of the stem 26"counter to the force of a pressure spring, not indicated.

Connected with the spring stem 76 can be a (not shown) cleaning wire,which wire cleans the ink passageway in the pen tip of the writing pen10".

I claim:

1. A stylographic pen having resorvoir included within pen barrel andreciprocable valve stem for venting the reservoir to the atmospherecomprising in combination:

(A) reservoir cavity closure, said closure forming a valve seat blockfor a valve stem;

(B) plural ink passages bridging cavity closure and reservoir wall, saidpassages communicating with said valve seat and said valve vent sternfor the removal of accumulated deposits of ink to maintain said valveseat communicating with said reservoir free of ink deposits for theoperation of said valve in venting;

(C) vent access for the closure.

2. The improvement of claim 1, in which the respective ink passages aredefined radially outwardly by said valve sea-t.

3. The improvement of claim 2, in which the respective ink passages areat least in part aligned with corresponding ink passages on said valvestem.

4. The improvement according to claim 1 in which the respective inkpassages are separably disposed from the barrel, said passages beingradially disposed conically with respect to said valve seat and saidvalve stem.

5. The improvement according to claim 4 in which the valve stem adjacentsaid valve seat includes plural ink passageways corresponding inalignment with at least a portion of said cavity passageways.

6. The improvement according to claim 1 in which the vent stern andcorresponding valve seat are of miniscule dimension with respect to saidreservoir, at least one of said ink passageways corresponding inalignment to a corresponding valve stem ink passageway.

7. The improvement according to claim 6 in which the cavity inkpassageways are arrayed in conical disposition with respect to the inkreservoir.

8. The improvement according to claim 1 in which the valve seat block isdetachable from said barrel.

9. The improvement according to claim 8 including cover means in whichthe valve seat block is secured, said cover means being detachablysecured to the barrel of said pen.

References Cited UNITED STATES PATENTS 2,512,004 6/1950 Wing 401-225X 2,81,739 l/1952 Wing 401225 2,581,739 11/1954 Miessner 401225 2,874,6792/1959 Zepelovitch 401226X FOREIGN PATENTS 857,986 1/1961 Great Britain401-260 1,073,878 6/1967 Great Britain 401-258 597,184 8/1959 Italy401259 LAWRENCE CHARLES, Primary Examiner

